Final answer:
British diffusionists believed that things originated in Britain, influenced by the British Empire's role in colonial expansion and trade during the 18th century.
Step-by-step explanation:
According to the information provided, the British diffusionists believed that things originated in Britain. This belief was influenced by the British Empire's role in colonial expansion and trade during the 18th century. The British colonies in North America, such as Massachusetts, Connecticut, Rhode Island, and Pennsylvania, were settled by different religious groups and served various purposes for the British Crown. Additionally, the British were pioneers in the industrial revolution and had a strong navy, which gave them an economic advantage and facilitated their influence in non-European countries.